Why the cheapest quote often costs more on a warehouse shelf
How to normalise supplier quotes so the lowest line item is not the most expensive choice over twelve months.
A warehouse manager in Mackay sent us three corrugated box quotes last spring. Supplier A looked 9% cheaper per carton. After normalisation — converting to cost per unit shipped, adding backhaul freight, and accounting for Supplier A’s higher minimum order — Supplier B was $1,140 cheaper over a year at their actual order volumes.
The normalisation steps we use
Convert to a common unit. Cartons, pallets, kilograms, square metres — pick one and stick to it. A quote in “per thousand” versus “per hundred” has tripped up more than one bookkeeper.
Add freight to door. Some quotes are ex-works from a depot you never visit. Others include metro delivery but exclude regional surcharges. Map every delivery point you use.
Apply MOQ reality. If Supplier A requires two pallets minimum and you use one pallet every six weeks, you are either over-ordering or paying storage to make the MOQ work.
Include payment term cost. Net 7 versus net 45 affects cash flow. For some firms that difference is worth a small price premium.
Look at waste and damage rates. A slightly dearer supplier with half the creased-carton rate can win on usable yield, not sticker price.
A simple spreadsheet is enough
You do not need specialised software. A four-column sheet — supplier, normalised unit cost, annual volume, annual spend — often settles the argument in one meeting.
If your team lacks time to build that sheet across five or more vendors, that is exactly what our audit deliverable includes: a comparison table your director can sign off without re-reading every PDF.